840560 has 80 divisors (see below), whose sum is σ = 2380800. Its totient is φ = 269568.

The previous prime is 840557. The next prime is 840571. The reversal of 840560 is 65048.

840560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×840560² = 1413082227200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10601 + ... + 10679.

It is an arithmetic number, because the mean of its divisors is an integer number (29760).

2⁸⁴⁰⁵⁶⁰ is an apocalyptic number.

840560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1190400).

840560 is an abundant number, since it is smaller than the sum of its proper divisors (1540240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

840560 is a wasteful number, since it uses less digits than its factorization.

840560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 840560 is about 916.8205931370. The cubic root of 840560 is about 94.3748424774.

The spelling of 840560 in words is "eight hundred forty thousand, five hundred sixty".